Guan Yunchang
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Practice Problems (3426):
Practice:
Prime Generator, Transform the Expression, The Next Palindrome, Factorial, Small factorials, Pouring water, Play on Words, Marbles, Highways, The Burning City, Ordering the Soldiers, Stable Marriage Problem, The Game of Crosses & Crosses, Poker, Bytelandian gold coins, Ambiguous Permutations, Enormous Input Test, Longest Common Subsequence, Sums in a Triangle, Simple Sorting, Not a Triangle, GCD2, ATM, The Rise and Fall of Power, A Christmas Pizza Puzzle, Johnny and the Beanstalk, Paying up, The Bytelandian Union, The Guessing Game, The Way to a Friends House Is Never Too Long, Battleship V, Place the mines!, Life, the Universe, and Everything, A Very Easy Problem!, Squash the Bugs, Paying up, XAndOr , Primes in the GCD table, Team Selection, A Coin Game, Prime Palindromes, The Lead Game, Permutation Cycles, Best Sums, A puzzle game, Modulo, The N Queens Puzzle Revisited, Effective Sets, The LCS Problem Revisited, The Best Box, Palindromic Numbers, Maze of Digits, The Matrix Game, Rational Numbers, Anagram, Binomial Coefficient, Palindromic Subsequences, THE GAME, Treasure Hunting, MineSweeper, The Next Prime, Edit Distance, Graph Counting, Array Transform, Genetics, Yet Another Number Game, Flipping Coins, Multiples of 3, Squirrel and chestnut, Gravel, Reduce string, Head office building, Adding Least Common Multiples, Ripple-Carry Adder, Backup Functions, Bombing, Bogosort, Fetching Cooking Tools, Arranging the Appetizers, Baking Cupcakes, Cleaning Up, Communicating Servers, A Simple Equation, Decreasing String, Product of Digits, The Perfect Chocolate Candy, Birthday Candles, Cooling Pies, The Hungry Bear, Byteknights and Byteknaves, Algebra Express, Choosing Cook Off Problems, N Knights Problem, Cutting Recipes, Number Game Revisited, Ski Resort, The Morning Commute, Pairing Chefs, Count Relations, Seeding The Pattern, Chef attic window, Buying Land, Coloring Colorable Graphs, Pruning Trees, Holes in the text, Whole submatrix, Three Way Communications, Cutting Rods, The Route, The Key, The Mother-ship, Money Transformation, Palindrome Palindrome, Rectangles Counting, The Great Wall of Byteland, Parade, A Prime Conjecture, RectangleArea, Maximal Score Path, Chef Teams, Closest Points, Billboards, Distribute idlis Equally, Most Popular Friend, Infinite Grid Game, Misinterpretation, Longest Weird Subsequence, Vote for the Noodle Soup, Open the Dragon Scroll, Counting Hexagons, Angry Chef - Crispy Chips, Short, Digits Forest, Repeated String, Chefs new Pet, Polynomial Partition Function, Last Digit Sum, Digit Rotation, New Restaurant, Hotel Bytelandia, Pattern, Evil Book, Across the River, Divisor Sum, Lucky Days, Generalized Arithmetic Progression Free Sequence, First non-Palindrome, Chef Travel Routes, Arithmancy, Subanagrams, Lucky Count, Lucky Number, Houses and Restaurants, Ciel and A-B Problem, Dynamic GCD, Lucky Long, Card Shuffle, Find a Subsequence, Favourite Numbers, Free Shuttle Service, Word Couting, Home Delivery, Count of Maximum, Spoon in Matrix, Fit to Play, Daily Train, Ciel and Earthquake, Little Elephant and Product, Combination Generator, Algorithm Challenge, Magic Trick, Change of base, How many Islands, Divisor Summation, Is it a tree, Double Strings, Jewels and Stones, Two Magicians, Find a special connected block, Substrings on a Tree, Little Elephant and Balance, Little Elephant and Strings, Stacking Pancakes, Lucky lucky number, Greatest Dumpling Fight, Connected Components, Similar Graphs, Selling Tickets, Divisible Pairs, String encryption, Little Elephant and Alcohol, Little Elephant and Magic, Little Elephant and Candies, Little Elephant and Movies, Little Elephant and Mouses, Little Elephant and Painting, Little Elephant and Colored Coins, Top Batsmen, Lights, PRIME, Resistance, Little Elephant and Bamboo, Little Elephant and Boxes, Little Elephant and Cards, A Home for Chef, Little Elephant and Exams, Kisses & Hugs, Remy paints the fence, Little Elephant and Bombs, Little Elephant and Music, Doom Bakes Cakes, Fierce Battles, Little Elephant and Balloons, Little Elephant and Lemonade, Chef World, My Fair Coins, The Gray-Similar Code, Gift Rift, Arranging Cup-cakes, Restaurant Rating, Event Organizer, Closing the Tweets, Prime Permutations, Connecting Soldiers, Golden Trees, Gifts at Olympics, Matchsticks, Block Game, Delivery Boy, Racing Horses, Ciel and Receipt, Queries About Numbers, Witua and Math, ChefTown Parade, Three is Crowd, Code Crazy Minions, Find the Goalkeeper, The New Scheme, Chef Game, Candy Collecting Game, Granama Recipes, Coin Flip, Recipe Reconstruction, Carvans, Buy1-Get1, Book Exercises, Tourist Translations, Magic Rankings, N Queens, Little Elephant and Permutations, Sridhar Likes Travelling, Buying Sweets, Equalization, Tennis Tournament, Little Elephant and Divisors, Rat Maze, The Minimum Number Of Moves, Arithmetic Progressions, Pizza Delivery, Barcelona Gameplay Tactics, Parking Woes, KGP Summers, Subset Sum, Game on a Grid, Expected Greatest Common Divisor, Root of the Problem, Packaging Cupcakes, Reversing directions, Lucy and the Flowers, Chef of the Year, Climbing Stairs, ChefGame, Count the Words, Vacation, Observing the Tree, Approximately, Queries on tree again!, Minimum Distance, Many Chefs, Three Different Numbers, Final Battle of Chef, Gandalf vs the Balrog, The Glittering Caves of Aglarond, The Mirror of Galadriel, Merciless Chef, Snape and Ladder, Palindrome, Hello Hello, Prime or not, Fire Escape Routes, Lack of Logic, Electricity Cutoff, Minesweeper, Perfect Square, Almost Prime, BiCo Gaming Grid, Helping Lira, String Query, Another Factorial Problem, Inverse Binomial Coefficient, Recruitment, TicTacToe, Superpowers of 2, ZooZooland Water Shortage, The Basketball Game, Name Reduction, Your Name is Mine, Save The Princess, Just Some Permutations 3, Andrew and the Meatballs, Andrew and the Strings, Dessert Wizard, Mountain Holidays 2, The Number Of Solutions, Galactik Football, Andrew and the Balls, Andrew and the Meatballs again, To challenge or not, The Probability Of Winning, Lapindromes, Furik and Rubik and Sub Array, XOR Sum, Subtraction Game 1, Subtraction Game 2, Chef and Walking on the rectangle , Chef and Segments, Chopsticks, Counting The Important Pairs, A Plus B Again!, Very Long Suffix Array, Maxim and Dividers, Maxim and Progressions, Sereja and Commands, Attic Crossing, Sereja and two strings, Online Shopping, Number of Factors, Sereja and Sorting, Sereja and Graph, Sereja and Transformation, Circle of death, Prime Distance On Tree, Draughts, Chef and Integers , Gangsters of Treeland, Tasty Dishes, CAO Stage-2, CAO Stage-3, Pairwise AND sum, Matrix, Three-Degree-Bounded Maximum Cost Subtree, Entangled Strings, Chef and Magic Numbers , Chef and The Colored Grid, Chef and The Right Triangles, Number of numbers, Counting D-sets, Fibonacci Number, Strange Matrix, Chef and Pie, Game, Tree, Chef and Science, Polo the Penguin and the Lucky String, Game Of Thrones, Polo the Penguin and the Test, Queries With Points, Polo the Penguin and the XOR, Uncle Johny, The K-th Path, Square Digit Squares, Substring Problem, Missing some chairs, Chef and Codes, Girl Friend and String Gift, Black and White Tree, Polo the Penguin and the Tree, Lucy and the Number Game, Lucy and the Math Analysis, Statues, Stand Up, Lucy and Palindromes, Exponential Game, Chefs in Queue, ForbiddenSum, ATM, Help Ragetti, Valley of Death, Rescue Jack Sparrow, Number Mirror, Am I a Fibonacci Number, Lowest Sum, Trees and Subtrees, List Editing, Rank of the Number, Funny Marbles, Magic Pairs, Reign, Sereja and Shuffling, Query on a tree VI, Chef and Substrings, Chef Goes Through Segments, Meteor, Chef and Favourite Sequence, Perfect Subarrays, Mike and Task Packages, Counting Matrices, Walking Path, Rich Rhyme, Family of Recurrences, Merging Files, Changing Money, Multi-Peg Tower of Hanoi, Please like me, Chef and Girlfriend, Chef and Feedback, Count on a Treap, Team Split, Election Campaign, Olympic Village, Stairway Reduction, One-Way Roads, Ant Colony, Message Coding, Toy Exchange, Sequence Alignment, Longest Common Pattern, Little Elephant and Subarrays, Sum Up, Farmer Feb, Chef and the Cake I, Chef and Shop, Chef and String, Spec Ops, GCD Sum, Chef and Numbers, Cards, bags and coins, Subtraction Game, Interrogating Gangsters, Compilers and parsers, Chef and Way, Binary Tournament, Walk, Maximum number, GCD condition, Chef and Magic Arrays, The Street , Little Chef and Numbers, Mike and Stamps, Atoms in the Lab, Counting Bits, Subarray Xor, Coprime Pairs, Give Away, Sherlock and Inversions, Missing Number, Chef and Remissness, Chef and Uniqueness, Dynamic Trees and Queries, Chef and Reunion, Cross the Maze, Game of Divisors, Sereja and ASum, Chef and Graph Queries, Final Battle, Sereja and D, Sereja and Arrays, Easy Tiling, Really Easy Tiling, Chef-jumping, Chef and Digits, Little Elephant and T-Shirts, Permuted Array Problem, Dividing Stamps, Divide the Tangerine, Make It Zero 3, Nice SubSegments, A Game With a Sheet of Paper, Chef and Reversing, Chef and Frogs, Chef and Ground, Chef and Chain, Chef and Segment Game, Chef and Digit Jumps, DARTS501, Chef and Rainbow Array, Chef and Rainbow Array - 2, Chef and Strange Matrix, Chef and Subarray, Sereja and Arcs, Chef and Bracket-Pairs, Shortest Path in Binary Trees, Chef and Left-Right, Chef and Words, The Malaysian Flight Search, Chef and Square, Divide the Cake, Ups and Downs, Stone, Two Companies, Count Substrings, Count Permutations, Count Sequences, Minimum Product, Count Substrings, Permutation Shuffle, Reach The Point, Divisible Subset, The Leaking Robot, Roots of a Tree, Forgot Password, Maximizing Marks, Snooker, Game of Numbers, Queries on the String, Time to Study Graphs with Chef, Counting Flags, Knapsack Problem, Painting, Sherlock and the Grid, Substring Query, Coprime Triples, The Smallest Pair, Subarray GCD, Subarray LCM, Chef and sequence, Fibonacci Numbers on Tree, Earthquake, And Operation, Shift The String, Lowest Common Ancestor, Simple Editor, Rectangle Query, Cleaning Tables, Copy-Paste, Present for Andrii, Sum Queries, Chef and Gift, Friends, Chef and Array, Fun with Rotation, Flooring, Divide or die, Harrenhal, Dragonstone, Children Trips, 2048, Chef and Strange Formula, World War 2, Tanu and Head-bob, Union on Tree, Convert the Expression, Jam, Sereja and Order, Sereja and Permutations, Magical Girl and Colored Liquid Potions, Updating Edges on Trees, DevuLand, Dinosaurs and Laddus, Chef and easy problem, Chef and easy problem 2, Chef and medium problem , Chef and medium problem 2, ICPC Pre-Prelims Practice Round, A Magical Length, Bye, inversions!, Cyclic Prefix, Permutations, Kali and Devtas, Spiderman and Jumping, Distinct Characters Subsequence, Matrix Problem, Chef and Red Black Tree, Chef and A Large Permutation, Chef and Notebooks, The Army, Walk on the Axis, Tree and Queries, A game of consecutive piles, A Simple Sum, XOR with Subset, Physics Class, Logging in the computer, The Problem Set, Launch Tower, Let us construct palindrome, Chef and a great voluntary Program, Chef and Churu, Player, Course Selection, Ground Stations, Chef and Strings, Mangalyaan-2, Landing Platform, Sereja and Two Strings 2, Mahesh and his lost array, Sereja and Salesman, Three elements, Chef and Apple Trees, Cascading Style Sheets, Sereja and GCD, Discount on crackers, Cracker shops, Sereja and LCM, Covering Sets, Brackets, Petersen Graph, Chef and Keyboard, Chef and Problems, Chef and Stones, Max Array, Parenthesis with Maximum Sum Subarray, Special Shortest Walk, Cultural Programme, Date, Charlie and Prime Numbers, Billiards, Sereja and Two Lines, Sereja and Votes, One Dimensional Kingdoms, Xor Queries, Delivery Man, Queries On Tree, String Matching, Bread, Ranka, Random Number Generator, Drawing Contest, Sequence Containment, Kings Dinner, Good Joke!, BlindDate Contest, Pilgrimage, Irrigating Farms, Finding Exponent, Devu and his Class, Fit Squares in Triangle, Piece of cake, Just multiply, Dhonis Bowlers, Matryoshka Dolls, Kiwi Number, Jersey Number, Gabba sprint, Artist Rivalry, Many bananas, Chef and Fibonacci, Suraj goes shopping, Tojo hates probabilities, Random Rudreshwar, Sign Wave, Let us play with rank list, Digits in Factorial, Xor Matrix, Chef and Equality, Devu and Locks, Little Chef and the King, Equilibrium number, Chaapu and Parcels, DOTS Player, Factorization, Let us play with even and odd numbers, Chef and Pattern, Chef and Interview, Message Typing, Lucky Four, The Warehouse, The First Cube, Sweet Deal, Robin and Gold coins, Broken Telephone, Median, Inversion sorting, Robot and Paths, Big Queries, Matrix, Find P-th Number, Jerry in a trap, Chef and His Friend, Counting on a Tree, Devu and binary String, A game on a graph, Nth Number in the series, Cats of Schrodinger, Library and Headcount, Hacking the Random Generator, Pair of Numbers, The Grand Budapest Hotel, The Imitation Game, Interstellar, Enemy at the Gates, Andrash and Stipendium, Fibonacci, Chef and Memory Limit, Virat and his challenge, Way Out, Chef and Prime Divisors, Easy One, Chef and Piano Scales, Little Party, Chef and Polygons, Set Difference , Black-white Board Game, How to Minimize a String, Devu and a light discussion, Chef and new recipe, Chef and Balanced Strings, ATM, Devus and their voting system, Common Strings, Palindromeness, Painting the Boxes, Flip Flops, REVERSE, Chef Anup, Lucky and Arrays, Version Control System, Prime Palindrome Sum, How to Repaint a Fence, Euler Totient Function Extended, Tickets, Snow Leopard and sum of primes, Bank and vulnerable passwords, Snow Leopard and his funny list of videos, Clarke and Australian Cricket Team, Counting Primes, Counting on a directed graph, Math Bond, Strange Race, Dance Competition, ACM vs CSES, Another Fibonacci, Laboratories, Ankit, Srijan and a game of stone piles, King test to his sons, Accommodating tribal clans, Gravity Guy, Displaying Da Vinci work, Unlock Secrets or Leonardo, Teaching binary to a child, Annual Sports Day, Polygon & Circles, DONT GET WET, Zeroes, A New Scheme, Mix Sorting, Find Missing Number, Chef and Cube, Chef and Bits, Password Validation, Rohith and Circles, Array Operation, Devu and Grapes, Maximum Matching, Devu and Manhattan Distance, Add Two Numbers, Find Remainder, First and Last Digit, Smallest Numbers of Notes, Sum of Digits, Reverse The Number, Helping Chef, Total Expenses, Id and Ship, Gross Salary, Valid Triangles, Grade The Steel, Gregorian Calendar, Ingredients, Second Largest, Small Factorial, Nikhil and Commands, Primality Test, Finding Square Roots, The Block Game, Farmer And His Plot, Chain of Doughnuts, Chef and Dolls, Chef and his Sequence, The Campus chapter effect, Merge Sort, Nikitosh and xor, Chefbook, Devu and friendship testing, Rupsa and the Game, Make XOR zero, Devu and most energetic minion, Rupsa and Number army, Train Partner, Cops and the Thief Devu, Maximize Disjoint Pair Sum, Bored of Nim, Cooking Machine, Time measure, Devu and his mouse Jerry, Divisibility by 9, Palindromic Queries, Chef and Trees, Chef and Table Tennis, Aggressive Negotiations, Churu and Balls, Count Subarrays, Count Steps in Matrix, Strange operations, Easy exam, Chef and Bitwise OR Operation, Chef and Submatrix, Chef and Two Strings, Chef and Tennis, Greedy puppy, Puppy and game, Chef and Sets, Race Time!, Treasure Hunt, Dividing Machine, Future of draughts, Chef And The Hiring Event, Fenwick Iterations, The Confused Weighing Machine, Puppy and cats, Code Land, Who dares to be a millionaire, Chef and Super Array, Chef and Rectangle Array, Receipt Recovery, Counting Subgraphs, Forgotten Language, Friends Meeting, Chef and the stones, Chef and the XORed Number , Chef and the Number Sequence, Churu and lost string, Eugene and function, Chef and the Wildcard Matching, Capital Movement, Make Palindrome, Minimum Maximum, Rupsa and Equilateral Triangle, Easy Queries, Pattern matching, Misha and Gym, Sum of palindromic numbers, The 8-Queens, The Gift Of Raksha Bandhan, Super Numbers, Chef And Operators, Jump mission, Simple Sum, Cyclist Race, Plane Division, Chef and cakes, Period on tree, Creepy Bob, Oracle Devu and Longest Common Subsequence, GCD on Tree, Max Subarray GCD, Alternating Colored Paths, Mahasena, Avantika, Chef and Filters, Poker Chips, Factorial to Square, Word Stem, Almost Sorted Permutation, Devasena, Kalakeya, Bhallaladeva, Seats, Finding Hardest Sum Value, Just Update and Print the array, Chef-Detective, (Challenge) Chef and Palindromes, Processing a string, Exam results, Chef and Tetris, Matrix Maximum Sum, MST, Finding sum, Mutated Minions, Petr Contest, Line Intersections, Computer Network, Ancient Berland Roads, Chef and Destruction, Matched Brackets, Wormholes, Matched Brackets 2, Chewing, Video Game, Distinct Codes, Black And White Cells, Palindromic substrings, MOD-Queries, Sereja and Line, Sereja and Array and Subtracting, Sereja and Pairs, Sereja and Tree 2, Chef and Sub Array , Urban Development, Bob and BST Permutations, Magical Strings, Alice and the Rainforest, Word Game, String Swap, In a planet far far away, The Christmas Gift, Jalebi Bai and Decks of Sweets, Chef and Pick Digit, Chef and Time Machine, The Parenthesis Tree, The making of a cake, Samosa Bhai and his Courier Company, Chef and Subarrays, Chef and Queries, The Christmas Cookies, Antichains, DP - Ways to write word, MATHS - find sum, The Revenge of Jalebi Bai, Wait for it, Save The Trees, Call Center Schedule, git, Circles and Squares, Jump on Buildings, Cat and Mouse, Chota Mouse and his birthday cake, Longest Palindrome, COINS, Exponential Sub-Palindromes, Product of two numbers, Longest Common Subsequence, Chef And Binary Operation, Bubble Swap Count, Chef and Fruits, Help Watson Escape, Fibonacci Queries, Gaint and Sifat, Euler Circuit , Traffic Count, Social Network, Malvika and Animesh play Red-Blue cards Game, Malvika is peculiar about color of balloons, Animesh practices some programming contests, Animesh has a war with tribal leader Malvika, Asif and Game Show, Praveen falls from a tall tree, Malvika conducts her own ACM-ICPC contest series, Animesh decides to settle down, King Animesh decides to have a voyage to the sun, Crazy Malvika discovers Crazy Fibonacci function, Monika And Song, College And Gift, Binary Strings, The Return of Palindrome, Puppy and Catchers, Chef and digits of a number, Number of Paths in a Grid, Not even planar, Digital clock, Dual Nim, Learn Segment Tree, Strange Functions, Alternating subarray prefix, Overhead Attack, COC battle, Divisibility test, Simple Search, Disabling Installations, Faded Palindromes, Gift and Chef, Chef and Socks, Chef and Tic-Tac-Toe, maximize the sum, Parity tree, Fullmetal Alchemist, Chef and Balls, Chef and Coins Game, Chef and Three Dogs, Puppy and Sum, Chef and Chocolate, Chef and Ballons, Chef and cities, Rain Water trapping, Counting Triplets, Arjun and Fibonacci, Prime Frequency, Asya & Encoding, Forest Gathering, Two Closest, Simple Statistics, Asya & Beautiful Strings, Asya & Coloring, Ada and crayons, Good Roads, For The Lack Of A Better Title, Total Palindromic Numbers, The Mortal Instruments, The potato problem, Beautiful Function, Fire and Ice, Chef And Magical Path, Dragon Warrior, Counting Zeroes, Locks and Cities, Profit Maximization, Sonal And Forests, Range Modulus, Intersections, Golu and url shortner , Cyclothon, Cab Service, Agent Chef, Chef And Coloring, Maximum K Sums, Mr Perfectionist, Mr Swegwan and Arrays, Help with selection, Multiuser Environments, Shopping, Summer Internship, Help with distances, Probability, Magazine, Climbing Stairs, PrePre, Movie Weekend, Odd Divisors, Queries on a Binary Tree, Polygon, Optimal Shopping II, Shifu and Strings, Cooking Schedule, Large factorials, Eugene and big number, The Bracket Problem, Chef and Round Run, Cats and Dogs, Laddu, Pay the Debts, BookWorm, Coins And Triangle, Captain Party, Akhil And Colored Balls, Akhil And Pending Homework, BRO AND HIS GAME, Devu and an Array, Cycle Race, Evaluate the polynomial, Primitive Queries, Yet Another SubSegment Sum Problem, Kitchen Timetable, Better Maximal Sum, K-good Words, Sticks, Art, Longest Increasing Subsequences, Chef and Sad Pairs, Robot Walk, Sharing Candies, N different palindromes, Different Neighbours, Cutting Cake, Chef and his study plans, Chefland and Electricity, Xortest Path, Beautiful Sandwich, Chocolates for Everyone, Collisions, One more weird game, Square in numbers, Chef Land, Range Minimum Queries , Chef and Mover, Travelling in a tree, Coloring A Tree, Good Numbers, Love among People, Maximum Grid, JosephLand, Provinces of ChefLand, Chef and Proportion, Chef and Numbers, Chef and squares, Theatre Square, Building Permutation, Sebi and the cube, Lost Password, Hit the Bit, Tweedle-Dee and Tweedle-Dum , Pattern Craft, 3 Divisible Subsets, Chef and calculation, Will and Closed Set, Naughty Sanket, Drumpf for President!, Lumpy - The Bus Driver, Kaps and his wife, Horrible Bosses, Quadruples, Print It, If - Else Problem, Digit Longest Increasing Subsequences, Mathematics, Nearest to Me, Studying Alphabet, Short in Average, Product of Diameters, Lock-Free Stack, Matrix Transformation, Pascal Triangle, Sorting Tool, Second Year Pains, Completing favorite game, Take Turns, Kth Max Subarray, Sahil The Anime Lover, JARVIS and LCP , Mahasena , Joker and Batman, Lazy Jem, The Lost Arithmetic Sequences, Shortest path queries, Natural Factorial, Chef and Inequality, Chef and Triangles, Zack And The Handkerchieves, Find The Factos, Weird Spider, Chef and Digits, Diagon Alley, Persistent oak, Coldplay Concert, The Crofts Game, Hikaru, Touya and Waya, Tree Palindromes, Batman v Superman, Find The Digits, Number Lock, Pattern, Nami to the rescue, The Jumping Kangaroos, Prime Numbers, Cheater Motu, Sherlock and the Ugly Flower, Watson asks Does Permutation Exist, Chef and midsems, Huge GCD, Luther and Brackets, Prime Digits, Chef and Cards, Sagar And Pens, Suresh and Game, Tree Balancing, Minimum Cost Walk, Luther and Palindromes, ChefWatson uses Social Network, DIGITAL RAIL, DIGITAL INDIA, Restore the Permutation, FastFood Combos, Bear and Shuffled Points, Sereja and Circles, Bob and his problem, Task for Alexey, A walk on a grid, Colorfulness of the squares, Infinitity, The Largest Bouquet, Largest HourGlass, Increasing Subarray, Help Lost Robot!, Beautiful Arrays, Watson and Digit Sums, Robolympic Batons, Chef and Bipartite Graphs, Counting Lights, Fight Club, Query On Strings, The Counties, Download file, To add or to multiply game, Hill Jumping, Mr P and his Friend, Egg Problem, Hardest problem ever, Rangoli pattern, LOST NAMES, Placing Rook, Run Length, Subway Lines, Sebi and the highway, Sebi and the black money, large fibonacci, Test the Year, Roses for Alexey, Pattern Problem, Matrix Multiplication, Fibonacci, Prime Numbers, Remove Duplicates, Fluffy and Scoreboard, Fluffy and Flippy Bird, Fluffy has a Robot, Tree Height, Maximum Xor Query, Visiting Friends, Virus Attack, Choosing Problems, Colorful Triangles, Chef and his Students, Tom & Jerry, Parhi And Multiplication, Chef and Subset, Chef and Queries, Chef and Numbers, Finding Seats, Sweet Shops of Kolkata, Coal mines of Kharagpur, Optimal Partition, Painting a Town, Coal Mafia and Toll Tax, Cookie Flavors, Mancunian Candidate Master Forever, Birthday Pizza Party, ACM ICPC World Finals Accommodation, Voting Fraud, Sum and Xor, Alice and Bob play Contact, The Saviours, Special Cracker, A Historic Discussion, Influence on Social media, ATM queue, Notes and GPS Chips, Black Money Island, Netcoin Verification, Mancunian Hoards Black Money, Bob vs ATM, Paint for Vernon, Playing World War II, Extreme Encoding, Zeroes VII, Men and Horses, Precious Stones, Mr Wireless, Pinocchio, Sum the Alphabets, Roads, Chef and Points, Quentin Tarantino, Superheroes and villains, Forming Teams Again, Jumping Frogs III, Employee Voice Surveys, WiFi Expenses, Fly height mode, MST Queries, Chef and Circle, Chef and Array (Challenge), Digits Cannot Separate, Reservior, Miss Spaghetti and her weird queries, Nothing in Common, Game of Friends, Mindfire & its Employees, Friend-zoned Parhi , Chef and Triangles, Segment Queries, Pattern, Pari and String, Digit Longest Increasing Subsequences 2, Sum of distances, Mixing flavors, Captain Virat and His Strategy!, Chef and His Apartment Dues, Number Wars, Most Frequent Element, Cisco and Magical array, Multiverse Queries, Flash the Saviour, Xenny and Alternating Tasks, Cooking Game, Transpose Matrix, Pishty and birthday, Bear and Random Grid, Bear and House Queries, Next Permutation, Bear and Extra Number, Bear and Milky Cookies, Hidden Message, (CH) Bear and Sorted Rows, Bear and Oveflow Points, Count Strings, Number Tower, Second Max of Three Numbers, Chef and Array, Chef Beautiful Array, Chef and Palindrome, Chef and Array Update, Chef and Weird Spider, Logan and his XOR debacle, Chef and Kites, Hogathon, Easy One-Electricity Bill, Rainbow Graph, Yet Another Card Game, Increasing Xor Sequence, Golu and Sweetness, Safe Robot, Sorting Problem, Professor X and Grouping of Numbers, Logan and DIGIT IMMUNE numbers, Bear and Ladder, Bear and Species, Chef and Prime Queries, Diameter of Tree, Dish Of Life, Bear and Row 01, Bear and Clique Distances, Similar Dishes, Freshers Party, Fitness Freak DJ, Legend of Zelda, The Birthday Tears, Max Out, The Legend, Beautiful Smriti, Magical Number, gnidoC esreveR, Rhett and Link, Bear and Xor of Sums, Bear and Candies 123, Factorial Problem, Flash vs QuickSilver, Neha and Birthday Shopping, Mayank and Line Segments, Bear and Digit Virus, Bear and Segments, Joey and food, Bear and Segment 01, Gotham PD, Chef and his daily routine, Courses in an university, Median of adjacent maximum numbers, Chef and Subsequences, A Good Set, Triplets, Snake Procession, Chef got Recipes, Temple Land, Hussain Set, Nasty Queries, Binary Tree, Cleaning the Space, Post Tree, Teleports, Hasan and boring classes, Consecutive Snakes, A temple of Snakes, Is It a Snake, SnackUp, Centeroid, Snakes capturing the Mongoose Cities, Chef and Universe, Snakes, Mongooses and the Ultimate Election, Snakes and their coup against The mongoose, Snakes and transition from Capitalism to Socialism, Waiting in a Queue, Snakes and Graph, Four Points, Ancestors in Two Trees, Chef and Pairs, Add or Multiply, Mex division, Robots in a DAG, Black Nodes in Subgraphs, Little Chef and Cake, Harry and magical number, Maximum Unique Segment, Two Numbers, Company and Club Hierarchies, Chang and Bitwise OR, Chang and the Perfect Function, Chang and Perfect Quadruples, BiCycles, Tree Expectancy, Chef and his string challenge, Maximize Grid Score, Hit the Coconuts, Whats in the Name, Calculator , IPC Trainers, Two Coins, Suhana and Matrix World, Girls and Historical Similarity of Strings, Walks on the binary tree, Boss and his Brother, At The End, Minimum Good Permutation, Find the Maximum Value, Good Pairs, Divide the Set, Jon Snow vs White Walkers, Palindromic Game, Greedy Candidates, Sum of Cubes, Querying on a Grid, Flower Pots, Difference array, Fill The Matrix, Game on Stick, Real obtuse, From heaven to earth, Product on the segment by modulo , Mathison and pangrams, Max Mex, Broken Clock, Weird Competition, Queens Landing, Little Chef and Sums, Counter Test For CHEFSUM, Chef Hates Palindromes, Fast Exponentiation, Infinite OR Game, Statistics Construction, Subsequence Equality, A Balanced Contest, Maya and her love, S-T Mincut, Chef and Cook-Off Contests, Total Diamonds, Polynomials, (Challenge) Connecting computers, Bits, Yet Another Geometry Problem, Very easy problem, Singular prime problem, Circles, Modular GCD, Chef and Counting Test, Chef and Employment Test, Chef and Weird Queries, Chef and Math Test, Chef goes Left Right Left, Buggy Calculator, Minimum SubArray, LOGICAL Pattern, Periodic Palindrome Construction, Obtain Desired Standard Deviation, Villages and Tribes, A tale of two trees, Days in Month, Strange Function, Killing Monsters, J - Reached Safely Or Not, C - Club of Riders, E - Password Riddle, Organize The Wallet, Fibonacci Series, Prime Factorisation, Matrix Median, Bridge Crossing, K Fibonnaci, F - Huge Number of Trees, Chef and Deforestation, A - Appearance Count, Skiing, Online Chess, Chef and XOR Queries, Random Pair, I - Secrets, D - Triangle Count, Smart Strategy, L-R queries, Strange Queries, Vertex Cover, Black and Red vertices of Tree, Chef And his Cake, Lucas Theorem, Method Resolution Order, Find an element in hidden array, Area of an amazing figure, Obtain Desired Expected Value, Queries on tree again, Four Friends, Penalty Shoot-out, Red and blue points, Chef Counts Semi-BSTs, Spanning Tree, Chess knight move, Science Fair, Good and Bad Persons, Minimize the string, Chef and Triangles, SAD Queries, Uniform Strings, Killjee and k-th letter , Taxi Making Sharp Turns, Spam Classification Using Neural Net, Non Overlapping Segments, Pishty and Triangles, Generating A Permutation, Optimize The Slow Code, Number Game, Coupon System, Proprietary Probabilistic Problem, Reverse the Number, Far Graphs, Beautiful Array, A Tale of Three Squares, A Tale of Two Right Angled Triangles, Football Match, Large Sum, Drunk Man in Large City, K - Raw Power, Sliding Puzzle, A Few Laughing Men, Coder Life Matters, Poetic word, Maximum Score, Chef Cuts Tree, Rectangle, String Merging, Minimum Maximum Confusion, Minimum Maximum Partition, Hello World, Arithmetic Progressions, Simple Fibonacci, Horse racing, Tom and his game, Barrel and password, Angry Killjee, Chef And Chocolates, Multiple of 3, Smallest To Square, Multiply the Array, Make array great again, Easiest Problem, Chef and Game with Sequence, N Sequence (Keteki), Max Subarray (keteki), Belal and his interesting Equation, Chef And His Characters, Chef 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Maximize Colours, Far Away, Sleep deprivation, Flip the cards, Equalize AB, Stick Break, Permutation Creation, Maximum Expression, Even Splits, Non-Negative Product, Two Different Palindromes, Remove Numbers, Permutations LCS, Where Is the Root, Longest Unfriendly Subsequence, Bounded Spanning Tree, Break the elements, Ranklist Pages, Reach the Target, Remove Bad elements, Chef And Array Construction, Maximum Subarray , Suspense String, Audible Range, Expert Setter, Speciality, Twos and Zeros, Podium Finish, Minimum Pizzas, Binary Substituition, Single Operation Part 1, Single Operation Part 2, Red Green Grids, Yet Another Palindrome Problem, Tax in Chefland, Paper Cutting, Card Removal, Minimise LCS, Different Consecutive Characters , Weird Subarrays, Red Blue Flowers, Subarray Removal, Reach on Time, Odd Sum Pair, Strange BST, Sorted Substrings, Make Multiple, Final Sum, Pythagorean Pair, X Jumps, Max minus Min, Test Score, STAR Pattern, Maximize 1s, The Quiz Finale, One-XOR Deletions, Packing Books, Make Length 1, Tasty Decisions, Avoid Squares Please, Maximum Angriness, Mario and the Broken String, Luigi and Uniformity, Range Assign, Number of Distinct Elements Minimize, Xor Array, Parity, Candies, Binod, Distinct Colors, Water Consumption, Hackerman, Split and Maximize, Spliting Balls, Time Complexity, Water Mixing, String Game, Palindrome by Splitting, Connect All Cities, Akash and Dinner, Just Like Mob!, Binary Battles, Squats, Monopoly in Chefland, Musical Rods, Expensive Steps , Minimum Number of Ones, Counting Problem, Tour of King, Boring String, XOR Product, Expense List, Rain in Chefland, Interesting Array, Bull or Bear, Make AP, Make Money, Sum of Cube , Divisible by A_i, Gcd of Subarrays, Good Investment or Not, Reach fast, Maximise XOR, Scalene Triangle, Convert to permutation, Kitchen Timings, Spice Level, Cost of Groceries, Minimum distance between 1s, Pet Store, Prime Reversal, Frequency Array Retrieval, Flip the Prefix, Instagram, Facebook, Snapchat, Expected Sum, Asymmetric Swaps, Perfect Trio, Indivisible, Apples and oranges, N Triplets, Sum it, XOR Tree, Chef Plays Ludo, Multivitamin Tablets, Lucky Numbers, Append for OR, Mana Points, Chef And Babla, Power Tree, Far from origin, Battery Health, Redistributing Chocolates, Overspeeding Fine, Lcm hates Gcd, Medicine Strength, Read Pages, Odd Even Binary String, Chefs Favourite Function, Equal Hamming Distance, Three Powers of Two, Saving Taxes, Profit Increment, Make Array Odd, Zero String, Expected Value, 400M Race, Love Squares Hate Cubes, Not Divisible, Bi_lindrome!, Permutation and Modulus, Netflix, Tekken, Tom and Jerry Chase, Codechef Airlines, K Increment Palindrome, Bitwise Equation, Passing Marks, Candy Store, Good Turn, One Stone or Two Stones, Split or Decrease, Add smallest prime factor, Distinct Opposite Sums, Better Deal, Ageing, Permutation Subsequence, Prefix Permutation, Matrix Pain, Just One More Episode, Single-use Attack, Running Comparison, Equal Elements, Beautiful Strings, Make Them Alike, Good XOR, Distinct Matrix, Divide Pages, Maximum Capacity, Sunny Day, Make A-B Same, Reach Home, Difference Matrix, MIN To MAX, Candy Division, Chef Eren, Construct String, Budget of Technex, Order by XOR, Couple Game, Max count of 1, Chef and Donation, Elections in Chefland, Max Binary, Chef And Adjacent Sums, Melt Gold, Crazy Bishops on Chessboard, Four Tickets, Buy Ten Packets, Efficient PAN Linking, Return the Change, Inversions of subsequences, Inside The Stadium, IPL Ticket Rush, Can Chef , GCD Queries, TripTastic, Least Size, String Game , Maximum And Or, Cricket Match, Unstable Subarray, Chef and Battery , Largest Y, CodeChef Learn Problem Solving, Maximise Score, Existence, Monopoly, Plus 2 or Minus 1, AB plus C, One or All, Positive or Negative Subarrays, Parliament, Tree Queries, DDMM or MMDD, Masterchef finals, Online or Offline, Largest and Second Largest, Sum of Goodness, Cheapest Office, Learning SQL, AP Free Sequences, Printing Binary Array, Favourite Numbers, Anti Palindrome, Rectangular Tiling, A Peculiar Arrangement, Chef and Polygons, Odd GCD Permutation, Chef Odd, Blobby Volley Scores, Bus Seat Numbering, Parking Charges, The Gift, Gymkhana Election IIIT-A, CodeChef Streak, Possible or Not, Search for 404, The Vowel Matrix, Distance Coloring, Dotify Playlist, Water Filling, Oneful Pairs, Break Free, NASA, Right There, 7 Rings, Problem, Alt-Tab, Boxes, Donation Drive, Donation Rewards, Transfusion Chain, EVacuate to Moon, Messi vs Ronaldo, Remove Multiples, FIND A and B, Weeding, AB Difference, Airport Management, Triplets Min, 2000, Segment Three, Two Piles, Card Swipe, Endless Appetizers, Puzzle Hunt, Exclusion-Inclusion, All New CodeChef, Maximum Deliciousness, I Can Use Both Hands!, Ultimate Fencing, Lucky Seven, Air Quality Index, Trade Surplus, Chocolate Distribution, Concussive Sequence, Ant, Minimize Xor Difference, Snakes on a Grid, Warrior Chef, Work Smarter, Not Harder, Lockpicking Chef, Off By One, Sports Section, Selling Insurance, Chef and Stocks, Squarified, Chef Fantasy 11, Save People, Smallest Excluded LCM, Summing the values, Chandelier, October Marathon, Divisible By 8, Dice Number, Construct An Array, Santa and Chocolates, Double Rent, Bone Appetit, Dracula Eats, Wishcraft, Survival Time, Minimum XOR, Rivalry, Clear Day, Chess Pairing, Cricket World Cup Qualifier, Water Park, Airlines, Exams, 404 Not Found, Food Costs, Fair Share Settlement, Minimise Maximum Subarray Sum, Game on Array, Thala For A Reason, Subtraction Sequence I, Lexicographic Rook on a Graph, Greedy LIS Algorithm, Painting Walls, Christmas Greetings, A PLUS B Remastered, Decorating Christmas Tree, Codechef Round, Chef Product, Hattrick, Exact Savings, Access Control, Subset GCD, Join States, Xorry 2, Judged, Cookie Day, Another Good String , Sub or Swp, Frequal, Split And Maximize, Anti Adjacent Swaps, Transformation Cost, Yet Another Alice Bob Game, Bucket Game
Contests (0):
None
Learning Paths (0):
None
Practice Paths (63):
Strings:
N Buttons 1 Bulb, DNA Storage, Wordle, Play Piano, Different Consecutive Characters , Malvika is peculiar about color of balloons, DDMM or MMDD, World Chess Championship, Chef and Happy String , Efficient PAN Linking, Studying Alphabet, Blobby Volley Scores, Lapindromes, Chef and Feedback, Chef and the Wildcard Matching
Arrays:
Compress the Video, Find maximum in an Array, Snapchat, Take discount or Not, Cost of Groceries, The Squid Game, MIN To MAX, Bomb the base, Running Comparison, Red Light, Green Light, Largest and Second Largest, Kitchen Timetable, CodeChef Streak, Difficulty Rating Order, Candies, Workers, Count of Maximum, Cops and the Thief Devu
Basic Math:
Test Averages, Fitness, Second Max of Three Numbers, 7 Rings, Chef and Chocolates, Make AP, Find Remainder, Integers that sum to the same value, Candy Store, Minimum Number of Ones, Scalene Triangle, Sum of Digits, Favourite Numbers, Make A and B equal, Construct N, Farmer And His Plot, Two vs Ten, Puppy and Sum, Divisible by 3, Balls and Boxes
Contributions
Problems Authored (0)
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Problems Tested (0)
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Editorials Contributed (0)
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